package/network/ipv6/map/files/map.sh

   1 #!/bin/sh
   2 # map.sh - IPv4-in-IPv6 tunnel backend
   3 #
   4 # Author: Steven Barth <cyrus@openwrt.org>
   5 # Copyright (c) 2014 cisco Systems, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License version 2
   9 # as published by the Free Software Foundation
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 [ -n "$INCLUDE_ONLY" ] || {
  17         . /lib/functions.sh
  18         . /lib/functions/network.sh
  19         . ../netifd-proto.sh
  20         init_proto "$@"
  21 }
  22
  23 proto_map_setup() {
  24         local cfg="$1"
  25         local iface="$2"
  26         local link="map-$cfg"
  27
  28         # uncomment for legacy MAP0 mode
  29         #export LEGACY=1
  30
  31         local type mtu ttl tunlink zone
  32         local rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
  33         json_get_vars type mtu ttl tunlink zone
  34         json_get_vars rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
  35
  36         [ -z "$zone" ] && zone="wan"
  37         [ -z "$type" ] && type="map-e"
  38         [ -z "$ip4prefixlen" ] && ip4prefixlen=32
  39
  40         ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
  41
  42         # fixme: handle RA/DHCPv6 address race for LW
  43         [ "$type" = lw4o6 ] && sleep 5
  44
  45         if [ -z "$rule" ]; then
  46                 rule="type=$type,ipv6prefix=$ip6prefix,prefix6len=$ip6prefixlen,ipv4prefix=$ipaddr,prefix4len=$ip4prefixlen"
  47                 [ -n "$psid" ] && rule="$rule,psid=$psid"
  48                 [ -n "$psidlen" ] && rule="$rule,psidlen=$psidlen"
  49                 [ -n "$offset" ] && rule="$rule,offset=$offset"
  50                 [ -n "$ealen" ] && rule="$rule,ealen=$ealen"
  51                 if [ "$type" = "map-t" ]; then
  52                         rule="$rule,dmr=$peeraddr"
  53                 else
  54                         rule="$rule,br=$peeraddr"
  55                 fi
  56         fi
  57
  58         echo "rule=$rule" > /tmp/map-$cfg.rules
  59         RULE_DATA=$(mapcalc ${tunlink:-\*} $rule)
  60         if [ "$?" != 0 ]; then
  61                 proto_notify_error "$cfg" "INVALID_MAP_RULE"
  62                 proto_block_restart "$cfg"
  63                 return
  64         fi
  65
  66         echo "$RULE_DATA" >> /tmp/map-$cfg.rules
  67         eval $RULE_DATA
  68
  69         if [ -z "$RULE_BMR" ]; then
  70                 proto_notify_error "$cfg" "NO_MATCHING_PD"
  71                 proto_block_restart "$cfg"
  72                 return
  73         fi
  74
  75         k=$RULE_BMR
  76         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
  77                 proto_init_update "$link" 1
  78                 proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" ""
  79
  80                 proto_add_tunnel
  81                 json_add_string mode ipip6
  82                 json_add_int mtu "${mtu:-1280}"
  83                 json_add_int ttl "${ttl:-64}"
  84                 json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR")
  85                 json_add_string remote $(eval "echo \$RULE_${k}_BR")
  86                 json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE")
  87
  88                 if [ "$type" = "map-e" ]; then
  89                         json_add_array "fmrs"
  90                                 for i in $(seq $RULE_COUNT); do
  91                                         [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
  92                                         fmr="$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
  93                                         fmr="$fmr,$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
  94                                         fmr="$fmr,$(eval "echo \$RULE_${i}_EALEN"),$(eval "echo \$RULE_${i}_OFFSET")"
  95                                         json_add_string "" "$fmr"
  96                                 done
  97                         json_close_array
  98                 fi
  99
 100                 proto_close_tunnel
 101         elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then
 102                 proto_init_update "$link" 1
 103                 local style="MAP"
 104                 [ "$LEGACY" = 1 ] && style="MAP0"
 105
 106                 echo add $link > /proc/net/nat46/control
 107                 local cfgstr="local.style $style local.v4 $(eval "echo \$RULE_${k}_IPV4PREFIX")/$(eval "echo \$RULE_${k}_PREFIX4LEN")"
 108                 cfgstr="$cfgstr local.v6 $(eval "echo \$RULE_${k}_IPV6PREFIX")/$(eval "echo \$RULE_${k}_PREFIX6LEN")"
 109                 cfgstr="$cfgstr local.ea-len $(eval "echo \$RULE_${k}_EALEN") local.psid-offset $(eval "echo \$RULE_${k}_OFFSET")"
 110                 cfgstr="$cfgstr remote.v4 0.0.0.0/0 remote.v6 $(eval "echo \$RULE_${k}_DMR") remote.style RFC6052 remote.ea-len 0 remote.psid-offset 0"
 111                 echo config $link $cfgstr > /proc/net/nat46/control
 112
 113                 for i in $(seq $RULE_COUNT); do
 114                         [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
 115                         local cfgstr="remote.style $style remote.v4 $(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
 116                         cfgstr="$cfgstr remote.v6 $(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
 117                         cfgstr="$cfgstr remote.ea-len $(eval "echo \$RULE_${i}_EALEN") remote.psid-offset $(eval "echo \$RULE_${i}_OFFSET")"
 118                         echo insert $link $cfgstr > /proc/net/nat46/control
 119                 done
 120         else
 121                 proto_notify_error "$cfg" "UNSUPPORTED_TYPE"
 122                 proto_block_restart "$cfg"
 123         fi
 124
 125         proto_add_ipv4_route "0.0.0.0" 0
 126         proto_add_data
 127         [ "$zone" != "-" ] && json_add_string zone "$zone"
 128
 129         json_add_array firewall
 130           if [ -z "$(eval "echo \$RULE_${k}_PORTSETS")" ]; then
 131             json_add_object ""
 132               json_add_string type nat
 133               json_add_string target SNAT
 134               json_add_string family inet
 135               json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
 136             json_close_object
 137           else
 138             for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do
 139               for proto in icmp tcp udp; do
 140                 json_add_object ""
 141                   json_add_string type nat
 142                   json_add_string target SNAT
 143                   json_add_string family inet
 144                   json_add_string proto "$proto"
 145                   json_add_boolean connlimit_ports 1
 146                   json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
 147                   json_add_string snat_port "$portset"
 148                 json_close_object
 149               done
 150             done
 151           fi
 152           if [ "$type" = "map-t" ]; then
 153                 json_add_object ""
 154                         json_add_string type rule
 155                         json_add_string family inet6
 156                         json_add_string proto all
 157                         json_add_string direction in
 158                         json_add_string dest "$zone"
 159                         json_add_string src "$zone"
 160                         json_add_string src_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
 161                         json_add_string target ACCEPT
 162                 json_close_object
 163                 json_add_object ""
 164                         json_add_string type rule
 165                         json_add_string family inet6
 166                         json_add_string proto all
 167                         json_add_string direction out
 168                         json_add_string dest "$zone"
 169                         json_add_string src "$zone"
 170                         json_add_string dest_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
 171                         json_add_string target ACCEPT
 172                 json_close_object
 173                 proto_add_ipv6_route $(eval "echo \$RULE_${k}_IPV6ADDR") 128
 174           fi
 175         json_close_array
 176         proto_close_data
 177
 178         proto_send_update "$cfg"
 179
 180         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
 181                 json_init
 182                 json_add_string name "${cfg}_"
 183                 json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")"
 184                 json_add_string proto "static"
 185                 json_add_array ip6addr
 186                 json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")"
 187                 json_close_array
 188                 json_close_object
 189                 ubus call network add_dynamic "$(json_dump)"
 190         fi
 191 }
 192
 193 proto_map_teardown() {
 194         local cfg="$1"
 195         ifdown "${cfg}_"
 196         rm -f /tmp/map-$cfg.rules
 197 }
 198
 199 proto_map_init_config() {
 200         no_device=1
 201         available=1
 202
 203         proto_config_add_string "rule"
 204         proto_config_add_string "ipaddr"
 205         proto_config_add_int "ip4prefixlen"
 206         proto_config_add_string "ip6prefix"
 207         proto_config_add_int "ip6prefixlen"
 208         proto_config_add_string "peeraddr"
 209         proto_config_add_int "psidlen"
 210         proto_config_add_int "psid"
 211         proto_config_add_int "offset"
 212
 213         proto_config_add_string "tunlink"
 214         proto_config_add_int "mtu"
 215         proto_config_add_int "ttl"
 216         proto_config_add_string "zone"
 217 }
 218
 219 [ -n "$INCLUDE_ONLY" ] || {
 220         add_protocol map
 221 }